when lincoln was elected. another was in 1933. we saw roosevelt. the depression was going on. roosevelt couldn't do nothing respond. hoover was a lame-.cal president. they decided to move it up so the new president could respond more quickly to a crisis. >> if it's on sunday, january 20th, do they have to move it? >> the constitution says the president must take the oath of office at noon on january 20th. that's been the tradition in the 20th century. back in the 19th century, they move it day. now the president takes the oath on sunday and takes it publicly on the 21st, but the constitution requires it's done on the 20th that this year he'll be sworn in on martin luther king day. what's the significance of that? >> a lot of symbolism. first he's using martin luther king's bible and lincoln's bible. we're talking about lincoln with the movie. this is the 150th anniversary of the emancipation proclamation. there's a monument. 50 years after "i have a dream," there's a memorial. so this story of race, slavery, civil rights and its involvement in our history is so important, so i think it'